Balanced valve



May 2, 1933.

J. L. THOMAS BALANCED VALVE Filed Dec. 27, 1930 2 Sheets-Sheet 1Inventor A llomey Patented May 2, 1933 tlNiTED STATES EMMETT T. BRUCE,ONE-FOURTH TO WILLIAM-D. FAVGETT, AND ELMEB F. ROSS, ALL OF OKLAHOMACITY, OKLAHOMA A E tjerri-cs JACK LEE THOMAS, OF OKLAHOMA CITY,OKLAHOMA, .AS SIGNOR OF ONE-FOURTH TO ONE-FQURTH 'ro BALANCED VALVE;

Application filed December 27, 1930. Serial 1\To[505,181.

tlon and arrangement of the several parts,

to be hereinafter fully described, illustrated in the accompanyingdrawings and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like character denote like orcorresponding parts throughout the several views, and in which Figure 1is a vertical sectional view through the invention.

Figure 2 is a section on the line 22 of Figure 1.

Figure 3 is an elevation of the valve.

Figure t is a top plan view thereof.

In the drawings, the numeral 1 designates the valve body or casing whichis formed with a laterally extending inlet 2 at one side thereof andwith an outlet 3 at its bottom part. Between the inlet and outlet portsthe casing is formed with a partition l extending entirely across thecasing. This partition 4 divides the casing into the upper chamber 13and the lower chamber 14 and said partition has the elongated arcuateslots or ports 6 therein for placing the upper chamber in communicationwith the lower chamber. A recess 7 is formed in the center of the toppart of the partition and forms a balancing chamber which is connectedwith theupper chamber of the valve casing by a passage 8. As will beseen the ports or slots 6 are arranged around the chamber 7.

The valve comprises a cylindrical stem 9 having arcuate Wings 10adjacent its lower end for controlling the ports 6. The lower end of thevalve is closed and a part of this closed end is adapted to fit in thechamber 7 when the valve is in closed position as clearly shown inFigure l.

The top part of the valve casing is'closed by a cover 11 havinga-packing gland 12 thru which the upper end of the valve stem pass-es.It will of course be understood that a suitable handle is connected tothe upper end of the stem 9 for turning the valve to open and close theports or slots 6; From the foregoing it will be seen that the fluidentering the upper chamber of the valve casing will pass through theports 6 when the valve is in open position and this fluid will passthrough the discharge 3. When the valve is in closed position the wings10 cover the ports 6 and thus stop the flow of fluid through the casingbut some of the fluid will pass through the passage Sinto the chamber 7to balance the valve. The balancing effect of the valve is made possibleby making the area of the chamber 7 slightly smaller than the area ofthe wings 10. By making the valve steln 9 of the same outer diameter asthe exterior diameter of the chamber forming parts of the partitionorseat and the stem 9 of the samediameter throughout the pressure in theupper chamber of the casing cannot act on any part of the same. Thisvalve is a one-way pressure valve used as steam throttles, boilerblow-off valves, escape valves on oil and gas wells, release valves forhigh pressure pumps both fluid and vapor, and for low pressure water orother fluid where a very sensitive float is required.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claim.

I claim as new is A balancing valve comprising a casing having apartition therein dividing the casing into upper and lower chambers,said par- .90 Having thus described invention, what 7 tition havingports therein and a centrally located balancing chamber opening outthrough the top face of the partitlon, and said partition having aconduit connected to said balancing chamber and the top chamber of thecasing, a valve comprising a cylindrical hollow stem the same diameterthroughout, and having wings thereon adjacent its lower end for closingthe ports, 5 the lower end of the valve closing the balancing chamberleaving a space between itself and the bottom of the chamber, adetachable cover for the valve casing having a gland therein throughwhich the stem passes, an inlet for the upper chamber of the casing anda discharge for the lower chamber thereof, the area of the balancingchamber being slightly smaller than the area of the Wings.

In testimony whereof I aflix my signature.

' JACIQLEE THOMAS.

